RECON: TNO occultation with 03TJ58

Event between 03TJ58 and star GA1120:02497763 with event index number of 2004741

Geocentric closest approach at 2026/02/27 05:34:00 UTC

J2000 position of star is 06:51:41.2 +23:47:35
Equinox of date position of star is 06:53:02.5 +23:45:54
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 4 degrees from the moon. Moon is 79% illuminated.
TNO apparent brightness V=23.7

[RECON map]
TNO is 41.9 AU from the Sun and 41.4 AU from the Earth.
The TNO is moving 12.2 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 712 seconds.
The 1-sigma cross-track error in the shadow position is 2844 km.
The sky-plane scale is 30013.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=195.0 km assuming a 5% albedo -- 16.0 sec chord
Diameter=79.6 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03TJ58, (2026/02/27 05:34UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:55.0 +27:57:39  1.1 12.77   9
Alhena         06:39:13.4 +16:22:29  1.9  8.09  12
37 Gem         06:56:55.1 +25:20:26  6.3  1.78   3
PPM 096653     06:53:35.2 +23:34:06  6.9  0.20   4
03TJ58         06:53:16.6 +23:45:36 14.8         4
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 1.3 sigma about the mid-time.
The median site spacing is 28.6 km RECON observability=1.0 and success probability=17.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:31:35 -41.3 Dark Up 53.1 232.0 Up 05:16:35 - 05:46:35 -1211
Kamloops 05:32:43 -36.1 Dark Up 60.1 212.4 Up 05:17:43 - 05:47:43 -1558
Kelowna 05:32:36 -37.1 Dark Up 60.5 214.6 Up 05:17:36 - 05:47:36 -1625
Peachland 05:32:38 -37.0 Dark Up 60.6 214.2 Up 05:17:38 - 05:47:38 -1640
Summerland 05:32:36 -37.1 Dark Up 60.7 214.5 Up 05:17:36 - 05:47:36 -1653
Penticton 05:32:36 -37.2 Dark Up 60.8 214.8 Up 05:17:36 - 05:47:36 -1658
Oliver 05:32:35 -37.5 Dark Up 61.0 215.1 Up 05:17:35 - 05:47:35 -1692
Anarchist Mountain Observatory 05:32:33 -37.7 Dark Up 61.1 215.7 Up 05:17:33 - 05:47:33 -1706
Tonasket 05:32:33 -37.8 Dark Up 61.4 215.9 Up 05:17:33 - 05:47:33 -1737
Okanogan 05:32:33 -37.9 Dark Up 61.7 216.0 Up 05:17:33 - 05:47:33 -1772
Brewster 05:32:33 -38.0 Dark Up 62.0 215.9 Up 05:17:33 - 05:47:33 -1802
Victoria 05:32:55 -35.8 Dark Up 62.9 209.0 Up 05:17:55 - 05:47:55 -1804
Manson/Chelan 05:32:35 -37.9 Dark Up 62.3 215.5 Up 05:17:35 - 05:47:35 -1827
Wenatchee 05:32:35 -38.1 Dark Up 62.8 215.7 Up 05:17:35 - 05:47:35 -1876
Ellensburg 05:32:35 -38.2 Dark Up 63.2 215.8 Up 05:17:35 - 05:47:35 -1920
Yakima 05:32:34 -38.4 Dark Up 63.5 216.2 Up 05:17:34 - 05:47:34 -1960
Toppenish/White Swan 05:32:33 -38.6 Dark Up 63.7 216.8 Up 05:17:33 - 05:47:33 -1980
PNWRO 05:32:23 -39.7 Dark Up 63.3 219.9 Up 05:17:23 - 05:47:23 -1996
Goldendale 05:32:34 -38.7 Dark Up 64.3 216.7 Up 05:17:34 - 05:47:34 -2041
The Dalles 05:32:36 -38.6 Dark Up 64.6 216.3 Up 05:17:36 - 05:47:36 -2068
Maupin 05:32:34 -38.9 Dark Up 64.9 217.0 Up 05:17:34 - 05:47:34 -2109
Sisters 05:32:35 -39.1 Dark Up 65.8 217.2 Up 05:17:35 - 05:47:35 -2204
Bend 05:32:33 -39.4 Dark Up 65.9 218.0 Up 05:17:33 - 05:47:33 -2225
Oregon Observatory 05:32:34 -39.4 Dark Up 66.1 218.0 Up 05:17:34 - 05:47:34 -2244
North Lake 05:32:29 -40.1 Dark Up 66.3 220.0 Up 05:17:29 - 05:47:29 -2302
Dunrhomin 05:30:47 -50.8 Dark Up 58.8 247.9 Up 05:15:47 - 05:45:47 -2326
CU-SBO 05:30:46 -50.9 Dark Up 58.9 248.2 Up 05:15:46 - 05:45:46 -2353
Chiloquin 05:32:34 -39.8 Dark Up 67.3 219.1 Up 05:17:34 - 05:47:34 -2385
Lakeview 05:32:23 -40.9 Dark Up 66.9 222.6 Up 05:17:23 - 05:47:23 -2403
Klamath Falls 05:32:33 -40.0 Dark Up 67.5 219.8 Up 05:17:33 - 05:47:33 -2419
Cedarville 05:32:21 -41.4 Dark Up 67.3 224.0 Up 05:17:21 - 05:47:21 -2468
Fall River/Burney 05:32:28 -40.9 Dark Up 68.2 222.4 Up 05:17:28 - 05:47:28 -2535
Susanville 05:32:22 -41.7 Dark Up 68.3 225.0 Up 05:17:22 - 05:47:22 -2590
Gimple 05:32:23 -41.7 Dark Up 68.6 225.1 Up 05:17:23 - 05:47:23 -2622
Greenville 05:32:22 -41.6 Dark Up 68.7 224.9 Up 05:17:22 - 05:47:22 -2623
Quincy 05:32:22 -41.7 Dark Up 68.8 225.3 Up 05:17:22 - 05:47:22 -2644
Portola 05:32:20 -42.1 Dark Up 68.6 226.4 Up 05:17:20 - 05:47:20 -2651
Reno 05:32:14 -42.6 Dark Up 68.5 228.2 Up 05:17:14 - 05:47:14 -2669
Carson City 05:32:14 -42.8 Dark Up 68.7 228.9 Up 05:17:14 - 05:47:14 -2706
Yerington 05:32:09 -43.3 Dark Up 68.5 230.4 Up 05:17:09 - 05:47:09 -2717
Gardnerville 05:32:13 -43.0 Dark Up 68.8 229.4 Up 05:17:13 - 05:47:13 -2731
Hawthorne 05:32:05 -43.9 Dark Up 68.4 232.3 Up 05:17:05 - 05:47:05 -2757
Tonopah 05:31:55 -45.1 Dark Up 67.8 235.7 Up 05:16:55 - 05:46:55 -2783
Lee Vining 05:32:07 -43.9 Dark Up 69.1 232.6 Up 05:17:07 - 05:47:07 -2824
Bishop 05:32:00 -44.7 Dark Up 69.0 235.1 Up 05:17:00 - 05:47:00 -2875
Beatty 05:31:49 -46.0 Dark Up 68.2 238.8 Up 05:16:49 - 05:46:49 -2897
Indian Springs 05:31:41 -46.9 Dark Up 67.6 241.2 Up 05:16:41 - 05:46:41 -2912
Henderson 05:31:35 -47.6 Dark Up 67.4 243.3 Up 05:16:35 - 05:46:35 -2956
Patrick 05:31:26 -48.7 Dark Up 66.9 246.2 Up 05:16:26 - 05:46:26 -3001
Kingman/Dolan Springs 05:31:27 -48.7 Dark Up 67.1 246.4 Up 05:16:27 - 05:46:27 -3028
Laughlin/Bullhead City 05:31:30 -48.3 Dark Up 67.5 245.8 Up 05:16:30 - 05:46:30 -3040
Mohave Valley 05:31:29 -48.5 Dark Up 67.6 246.4 Up 05:16:29 - 05:46:29 -3069
Lake Havasu City 05:31:27 -48.9 Dark Up 67.6 247.6 Up 05:16:27 - 05:46:27 -3107
George/Scottsdale 05:31:08 -50.9 Dark Up 66.0 252.2 Up 05:16:08 - 05:46:08 -3140
Parker 05:31:26 -49.1 Dark Up 67.7 248.4 Up 05:16:26 - 05:46:26 -3143
Wildwood 05:31:55 -46.0 Dark Up 70.8 242.4 Up 05:16:55 - 05:46:55 -3225
Idyllwild 05:31:41 -47.6 Dark Up 69.6 246.1 Up 05:16:41 - 05:46:41 -3231
Calipatria 05:31:31 -48.7 Dark Up 69.0 249.2 Up 05:16:31 - 05:46:31 -3274
Yuma 05:31:25 -49.5 Dark Up 68.4 251.4 Up 05:16:25 - 05:46:25 -3303

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 03TJ58, (2026/02/27 05:34UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 12.77   9
Alhena         06:37:42.8 +16:23:57  1.9  8.09  12
37 Gem         06:55:18.6 +25:22:33  6.3  1.78   3
PPM 096653     06:51:59.9 +23:36:06  6.9  0.20   4
03TJ58         06:51:41.2 +23:47:35 14.8         4
Positions are for J2000

Event circumstances last updated at 2022/04/13 23:14:08 UT

Marc W. Buie, Southwest Research Institute

RECON